Consider a three$-$phase $-$Y connected $AC$ generator$/$load system where the line voltage has a magnitude of $480$ V and a balanced load of $Z_L=(60+j40).$ Show your work for the following:

$($a$)$ Draw the circuit diagram for this system

$($b$)$ Calculate load currents $(1_{ar},I_{bn},I_{brn})$

$($d$)$ Calculate source phase currents $($laber lacilca$)$